Skip boom and skip for concrete pavers



Sept. 12, 1933. BAKE 1,926,142

SKIP BOOM AND SKIP FOR CONCRETE PAVERS Filed 001',- 10, 1931 4Sheets-Sheet 1 v x j L 3 3 I 1] J a @Wv Fixed LhDalt 3% VQQWN v .fi w h.E aw ww R v WmWN SKIP BOOM AND SKIP FOR CONCRETE PAVERS Filed Oct. 10,1931 4 Sheets-Sheet 2 Inventor."

z ed L. fl alce.

Sept. 12, 1933. F. DAKE SKIP BOOM AND SKIP FOR CONCRETE PAVERS Filed001:. 10, 1931 4 Sheets-Sheet 3 inueniior:

Fi'ted L Sept. 12, 1933. DAKE 1,926J42 SKIP BOOM AND SKIP FOR CONCRETEPAVERS Filed Oct. 10, 1931 4 Shts-Sheet 4 o; o I ,1 18 26 *2 16 27 24 Za 28 LL 2.? 3 a Inventor. l ked L. Y ,anle,

' vid'e e, difierehtialjselfaraisihgfskip beam s.:1i0 -ma y flush-withthe, upp rvis -i 5 stiiuetm e' of the payer, to thereby cutflidwri thenormalheightof.themachihe. I

V 125 granted Decemb'er,, 1

I 5 bf i'aisi ng' meansl or,slightlyftaster.i I. J

time, meansere piiqyided ferso supportiiig the i "P nt Se t. ;12; 193313m v ,BOOM Q Fred Da ke; N1inda,

I Foobe' Company, 11110.;

fis of Delaware v et whichthy ar op rated. a.

' stillanother'ob'ect ofthe invehtiqnis td pro- As is weliknown, iiiostpavers muse tdday have f a; fifame exter ding frem'the topofthepaver up; weirdly to I-prjQvide 21- 'meaicis ever which a cable I may'pass' 'to elevate the skipg ainq inasmuqh vas payers alre 'relativelyhighejriyvvay; thewextra l5ii ame often p 'oves an Iinconvenience forshipment; as it is chine is beingfltransported er moved from one p1ace,toa.nother; I r I i ,An objeqt-of the pres ent invention, therefore, is

to produceia, payer- 01:- the MwellkridwnFoQte type,

' which dispenses] with the well-known, A-frame,* which -A-irame"isshown'in Patent 1 1810.; 1,565 ,634,

I foriBoom drives; i g mstillianother objectdf the i-nventionPis tdpifde' vide apaver with-askip bo'om' thatriormally lies parallelwith-the t'op oi the-navel and which has 0 a difierentialmovement, S'Qthat as the skiplisziele-i vateithe skip boom alsoeleva tes'but ataglower" rate of speed than the skip; 1

V ,ivide a, differential self-raising skip bobm, wherein p the liftingcable'pf the skip'may be w at: term-a vide .a, si ie nti skipbiomqwiiereii the "first mdvement ofthe skip {raises the skip boomgi'aii-i iai hi p the oe pijs'peeq qf th bi omginc ssthe skip appiqaches its. full: raised positieh. Still anothei 'objectbi theihvehtioxi is to pigproximately the time fthat it has with fother forms"videa; skip a i ig'sk ii, bs m migiif in eab1e;a11-

0f w i'i ii sitgsre so assqciated thatthe-usual.

'vtep frameis dispensed while, at the smile II ly'and rapidly and safelyas befqre mne m n s andfwmb' 'on a'pt toebhtact' with the top of 0111-,v'erts, i Q1 bridges making it generally necessary; therefore, to lowerthis top frame when mama-I.

1' s tien' md showing aebfnveri tinal form of N. ywfiis sigiidi t Thebibieth 'i n" m yb elevated s i jgiiics I With t e mis omerobjects vetion consists in eertaLin ne eribed arid. pdin'tedput fully ies he enafteri-me 1 2 5-1 V fferrefi eihbodihiehtiefthe inventiohQ-f i Ipayershowing the skip its 'lqyqeredpositio and.

loweiedp ositipn, the-dotted :lines showing the 5 V r rs: el a po itiskip and skip boom thei Fig 73 a viewsimile'r .to Fig'.L1-,-but showingthe skip and'skih bdqm 'fm their elevatedipos'ition, the ssues; lil es ishowin the said fpart's in their;

bwe e abr an mali s o difie r'ential seiifr is g ,skiptboom and/ theskipw hem-skip movement pf,- the;skip;and also the rel;tive,move- I I imentbflthe -skip boomftherewithi Still :anotherabject 'ofithepinventionis-topro Referring hew more particularly-t0the seiieral tviews," and toFig." 1 jot themomentthere is 'shpWnfthe paverv chassis or frame 1, onwhich is, mounted the drum 2,. 1 There; is also shown theupifights 3fltheiframel of'the paver,"whi1 eat j the toptmaybelseeh 2; top" side frgmeA; f

-It; will bei.understoodthatI halve only sh n'f 1 as muc of thep'awer asis nece'ssary to illust 'ate 7' the skip and'ifis? elevating meansg f Tcthe uprights 3, "there pivotefthe skip' 5,;the sii'pport- I f i fei'ied.tom; and extending acrossthe sme may be seen {the skip boom 9 whichcbmpr'ises two heavy members 10, :which;are pivotally' npuntei, I as at11-,;bnthe cross 'rqd; 12;

' practically pne :sbhd' member a't their outejtesd I de elevstibh HFigiA'i's a fragmentaryytop 'p l sii' view the aftjoi -1 g substantially'2.iiei'dss seeticheitieti ta nfinzthe.

These members 10 1 V are bentiinwardly, 1 ajs at-:13, so that' theyfformI 14. Mounted in outer end14 of'the co POS- ite boom 9 are the twosheaves 15 and l6. v

Now 'mounted respectively on the shaft 17,

' which shaft extends across the members 10 that form the skip boom, arethe twodepending arms 18, which are ofiset, as at 18', and pivoted at;

their lowerends', asat 19, to the cross bar 19*,

which bar extends through the oppositely-posh tionedplates 20 which areformed on the oppositeside of the skip 5; I i

' As also may-be seenin-Fig there isa brace 21 that extends under theinner end of the skip and between the ends of the rod 6 to thus rigidlythan running into the drumof the mixer. In

' fact] the entire inner end ofthe' skip might be @cOVG 'Qd; ifSdde'sir'ed.

a usual manner.

23,- in turn-,swill be started and stoppfidhn the The cable "24- extendsupwardly, as seen, and passesover' a'sheave '25 mlounted'in thetop sideframeoi'the'paverahd then extends outwardly overtheshe'ave 15, whereitth'en' passes downwardly, as'at 26, -to pass over the" sheave v8mounted" on the @skip, and then upwardly, as at' 2'7,' over the sheave"16- an'dj then downwardly,

, -atj28, where it'is connected at its outer end,-;as

at 2 9 ,'to the said baror'rod 'li In oth erwords,

thereis what .mightbetermed a three-line" cable extending between the 3tends centrally down the boom and centrally ef the skip.

a of thepaver to support the skipya's'in the former i V typesof Footepave'rs;-j

" 7 f suppo'sing'the skip isin 'itsalowered position,

f diagrammatic. view of Fig. 6.; After the-skip is loaded Withtheaggregates, means (not: shown) i for starting. the:drum'wi1l-be;operated to 11311115 issubstantially flat or level acrossfit's top, 'sothat when' the .paver is moved either on aifiitcai or trailer or"in'iact' in any-waymo'ved from 0 place to place, there is 'no'top frameto-be taken Operation the 'several 'par'ts ofthe "differential selfi'aisin g skipboomand the skip'will be :in:th'e-.position;

as; shown'in Fig. 1}:andalso' a'slgshowni inAthe I by step, movement-ofthe .skip andboom the wind up thecable-24k As the cable isjthuswourrdithe first movement will be 8,

the} arrangement of the sheaves, asshown, the

powervrequiredyto raise the skip will,- of} course,

be less than if only one bight .of, the cable ex-' tended. to'the skip.I

Now referring to the manner 1of;raising the skip, I there will be'seenin Figl'llthe'skip' elevating drum 23, over which the cable 24isipassed, :and itwill beuriderstoo'dthat to-operate this cable the drumskip and the skip" boom. It will also be noticed from Fig. {that thiscable is what I terma centerline cable, that is, it'exwill be seen asfar as the specification hasproceeded that there is no additionat'topframe extending 'from the top horizontal" frame In 'other words,the.paver raisingfof :the "skip; and-a; slight raising of the skip-boom 9.-Due' .to afthr'ee-line cableextending to the skip and V1%) and thefloatingpivotal points 17 of the arms .18, will push the boom 9upwardly, it being re-.-

inemb-ered that .the inner end of the skipis pivotally fixed, as at 6.The rate of theupward movement of the skip :is substantially twice thator -the rate of rnovement of the boom, so thatas w'lll'pass throughthe'relative positions shown theskip-is continued in its raisingmovement it ment the skip will have practically caught up to theposition ofthe skip boom. Thus, the boom not only provides a support forthe cable to elevate the. skip but, as the skip raises, moves itself outof. the-wayof the skip or, in other words, moves ahead'of it; so 'thatthe upward'movement of the skip is in no way limited or obstructed "bythe skip'boom which, of course, would be the case ifthef boom remainedinits normal or hori- .zontal'position. Y Y

. The upper limit j of travel or theskip is illustrat'ed'in' Fig.3, andit will be understood that 7 thefskip inrais'ing-zp'ushes thefboomaheadof it, but due to the floating pivotalpoints of the arms 1 8; andthe fixed f pivotal .point of the skip, the skip -nearly -overtakes'theboom at its upper;

most limi of travel. Th us, it willfbe seen that there "a'differe'ntialjmovement existing between the skip and otal-movement ofthe skip, throughthe arms 18, pushes the skip boom ahead out of thewayof the oncoming sk-ipf of it' and thus boom zisa self-raising" one";as the upward f'p iv Q5 which boom is raised and lowered'as the ski'p israised and lowered, thus doing away with the ordinary rigid super-frameQis relatively heavy and that substantial means have-to: be providedforgsup'p'orting the, cable is: also necessary; to raise the "skip.

'that elevates the skips-,while considerable power '1 -With thearrangement 'just outlined, however,

the ordinary form' -of cable drum may beiutilized, as thepowerinecessary is cut down by using the double arrangement-of thesheaves and the threading of the' cable, as shown,' and I havealso-found ithat gthe sp'eed of the "skip is practicallythesame"asbeforeor slightly faster.

- -It is also'to' be appreciated that a-loaded skipl l "ItiisalsO tobe'noticed that byproviding what might be termed a bloclCandtacklearrangement ofvthe' cable" between theskip-boom and I the skip,"thecable "isfalwaysjkepttaut or; in

other wordsf fre'e from slack, even though: there is a differentialmovement between the skip boom i It will be understoodof course,although Lhav'e mentionedthat VFigs.--5 to 10' show a step movement willbe continuous, and the figures are ing the-continuous movement of.theskip that the skip 'will pass through, together with the" supposedtooutline the differentipositions dur- ,1

but as "the skip reaches its-lowermost 'end of "travel again, the skip'bo'omwill haveagain assumed the position shown-in'Fi'g. 1, that is,.'flush with the to psideiframe of the paver.- I

'From'the foregoing, itwill be 'seen that I have provided a-paver,wherein the ordinary top frame is dispensed with and in stituted. adifferential 'self-raisingj-skip' boom.

its placethere is sub-* tiurthermoregthe power necessary to raise the II i skip and boom is no more thanfound; eoessaryg the rate of trave'l ofthe skip Wi ththe old torm di skip and, atjthe sameitime;

or even slightllyIasterQ.

f I am-aware that it s old -tosimply' dispense" with super-frameston-the elevating of the skip,

and I "do; not claim my inventionfassuch, but.

when I do clai'm and desiref tosecure by iL'sett s v 0 V v V v Patentis:

1. Insoor-ribination with a concrete p'av er, a-piV- V otallyf mountedskip, a skip boom pivoted at its rear end to saidpaver and extendingdirectly over the central longitudinal axis ofthe skip arms vating ofsaid, skip boom.

' 2. In'combination'with a conoretepaver; a otally mounted skip,1a-skipboom pivoted at its" 1 rear end to said paver and extending outwardlyand directly over the 'jcentral long-itudinalaxisof the'skip'an armpivotallyconnected to the-skip boom at a point remote irom thepivotalipoint of said boom and pivoted also to thQSkj-P at a "pointbelow theipivotal point of the skip, whereby f an elevating of the;skip'willpause; a raising of the skip boombut. at a slower rate than therate of upward movement of the skip; i i

3. In combination with 'aconcrete paver,,a pivi otally mounted'skip,skipboom' pivoted. at its rear.

end to 'saidpaver and extending out overthecen-f tral longitudinal axisof the skip, arms pivotally connected to the skip boom at apointremote'from andextending outwardly anddireotly loverfthe centrallongitudinal axis of the skiparms'ipivot- 7 M {boo nand toqthepaventocausethe boom to 3 op 1 elevatewhensaidskip-is,elevated and-acable passing along said sheaves and connected to the the pivotal pointof said boom and also pivoted to Y a the skip at a point'removed fromtheipivotalpoint' of the skip, a cable forloperating the skip, and amovementof the skip causing a movement of the skip .boo ni butat a'different rate thereto. 4'0

' 41 Incombinationwith aconcrete pavergayskipf pivotally mounted atitsforward end to, the paver,

a skip boom pivoted at its rear end to saidlpaver' ally-connectedtoo-the" skip fboom' at apoir1i,1. 5

moved from the pivotalfpoint'of said-boom, and] also pivoted to the skipat'a point removedifrorn the forward end of the skip, a cable passingalong I' said boom and connected to' said'skip whereby a movement "ofthe skip will. cause; a movement of the skip boom but at a differentiatethereto, the] cable so threaded betweenthe boom and'the skip that theslack caused by thedifierential movement between the skip and thebooznwill be taken up. 5. In-combination'with a concret'e'paver, a piv 1 otedskip and apivoted skip boom, said'boom extending outwardly and directlyabovethe central longitudinalakis of the'skip pivotal arms between I theboom and the skip and the pivotal pointso arranged that the skip andbooin'fmove at a ldif.- ferej'ntialnrate'of'speed. f 6. In combinationwith a conclrete paver, a differentia l self-raisingskip boom, a skippivotally;= mounted to-the paver-andto'the' skip boom andif the boomextending along the central longitu dinal' axisio'f the'skip:, 'and acable so threaded betweeirthe skip boom and? the skip that the Cliff-,ferentialirate of movement'will not cause a slack in said cable. P

v". In combinatio a pivotal-skip boom, acenter line cable extendf ingalongthe boom and connectedto'the skip, and,

arms pivotally connected atftheirfone endto the" skip ata point remotefrom its pivotal point and? 1 at their opposite 'endpivoted to thelskipboom and is the same .as before I :-1 0.- :I n combination'with aconcrete ipaver a 1 pivotal skip a;differential selfiraising skip boom,extending along the central-longitudinal axis ofb jthe skip andcooperating with said skip; a cable; Y extending along said boom-andconnected to said skipfand soconneoted as tO PIGVBIlGQnYfSIEiCKbe- Mftweenjtheqskip boom, and the skipandjto de-f V V crease f'the powerload necessary to elevate said;

Se nwmammi e pivot'al point ,meverhen t of thev kipsboom onltheelevatingand lowering iofythejfl d skip "boom. to thereby causefa"differential 7 Santana and the sa-idf' skip boo'rn being' direetlyove'r the-oentral longi axis oi'the skip. --'B.fln;combi nation withiapa'verj a pivotal skip; l

pivotal :skip 'fboom extending 'inla, plane di 'ect 13 over the centrallongitudinal axis of the skip, V

1 said skip boom substantially horizontal-with; the fltopaofthe paver, aoableektending along the boom A connected toitli'e .skip,ijpivotallarln'isLsor con-, 7 r

ne cted to the-skip andskipboom as to causea Y differentiallmovementbetween the skip 'and the *skip boomon'the-elevating and'lowering-oi theskip by saidcable, and the said cable so threaded) 3 between the skip 1and" skip boom :as to 'redu'ce ll II i r the power required to raise theskip;'-[

19; In combination'with apaver a pivotal skip i; U i 595v llongitudinalaxis' oi theskip,saidjskipboornsub ,stantially horizontal withjtheftopof the pavenb a center linevcable extendin'g' along the boon'iland i 5'connected tothe skip, pivotal arms so connected (to, the skip and-thefskip bo om as to causefthef boom .to raise as the skip is raised butat. a dijfj f..f erent rate of vspeed thereto, and thecable hav ingthreebights extending between the skip boom, and'the skip to thereby decreasethepowerneces a'pivotalskip boom extending along the, central sear-yamelevatetheskip. H

Q11. In combination wentconcrete pav'er, a composite boomhavingitwosheaves at itsout'er' 7 end, askip pivoted.beneathsaid. boom and thecentral longitudinal aXi's-ofthe skip being direct- 1y beneath the saidboom; arms pivotedfto the V I skip for elevating said 7 a f 12.-1Incombination w longitudinal? axis *of the 'fski'p being directly be- I VH Y Y h;a;,concrete ;paver,apivotal skip-boom;normally horizontal withthef pavejrf'ja skip pivotedto"the pavei'andthecentral, 5.

,Whehfsa id skip is moved and, ate different rate] ofq speedjtheretoj iacablei gezitendmg along the boom and; havingiamultiplicity"of'bightsiextending between theskip boomandthe skip-to there:- by reducegthe',power-necessary 'tol raise theskip skip tboomand the skip;

by: the number of bights extending v between th 13C111?oom inatiomwith-aooncretelpaver', a V apivotal skip, meansfor elevating the same, apivotal skip boom extendifiglpver: the central longitudinal axis of' the'skip,-pivotal arms ex-F ,1 Yr 7 h fi'ten'ding between thepivotalkskipnq e S ep-;

with a paver a 'pivotalskip,

boom, i and -the pivotalpoints "of said arms re-- mote. irom'f thepivotal points of the skip boom elevating means is utilized. I

1 ass,

andi'e pivotal skipboom extending directly over I thecentrallongitudinal axis; of the skip, means pivoted at its oneend-to-the 'skip boom ata' point '5 remote from the'pivotalaxisof theskip boom,

*e dsaid. means pivoted at its opposite end to the skip'at a, pointremote from the pivotalpoint of said skip, to thereby cause the said.boom to raise when the skip is rate-of speed thereto. p e

15. Ineombination with a w a pivotal skip and a normally horizontalpivotal ,skip boom .ex-' I mised but at a decreased tending over thecentral longitudinal axis of the skip,; a ,cablenfor' elevatingandlowering the skip, pivotal, arms-extending between the skip boomandsthe" pivotal skip and the arms positioned at a point remote'from thepivotal point of the skip and the pivotal point ofhthe skip boomwherebythe skip, boom is raised onan upwardmovement oftheskipbutsubsta,ntia,11y overtaken by the skip asjthe skip approachesits topmost limit of travel v e v FRED L; DAKE, .90

